The answer is
B. In the fall, a bear builds a den.
or
C. A person is shivering in the cold weather.
The right option is; B)missense
Missense mutation is the type of mutation that causes sickle cell anemia
A missense mutation is a type of nonsynonymous substitution in which the change of a single nucleotide (base pair) influences the genetic code and results in a codon that code for a different amino acid. This type of mutation can affect the function of the protein, and it is responsible for human diseases such as, sickle-cell anemia and Epidermolysis bullosa.
Answer:
DNA is the molecule which determines our eye colour, enzyme production and body structure.
Since you say ‘which’ , in order to answer you, we would need the options you are given, but my answer would be
1. Not reusable
2. Might use up someday
3. Burning it will produce carbon dioxide and worsen global warming
Hope these can help :)